岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2013年
z2期
88-93,99
,共7页
张良刚%吴立%徐昌茂%陈剑
張良剛%吳立%徐昌茂%陳劍
장량강%오립%서창무%진검
Hoek-Brown强度准则%模糊综合评判%扰动系数D%扰动区
Hoek-Brown彊度準則%模糊綜閤評判%擾動繫數D%擾動區
Hoek-Brown강도준칙%모호종합평판%우동계수D%우동구
Hoek-Brown strength criterion%fuzzy synthetic evaluation%disturbed factor D%disturbed zone
阐述了岩质边坡岩体力学参数研究的意义,介绍了国内外常用的几种岩体力学参数的确定方法,但其准确性值得商榷和论证。针对Hoek-Brown强度准则D值的确定存在的困难,基于模糊综合评判,对产生扰动的影响因数综合考虑,确定了依托工程的 D 值,工程应用表明更加接近实际情况,并且探讨了岩质边坡的岩体以滑动面为界限划分扰动区与非扰动区的合理性,克服了其他公式的不足。以利比里亚邦矿铁矿岩体力学参数研究为例,分别用计算出的修正参数和其他几种方法进行计算分析对比,结果表明所计算出的修正 D 值更能反映实际的扰动程度,并论证了划分扰动区与非扰动区的合理性和意义,具有重要参考价值。
闡述瞭巖質邊坡巖體力學參數研究的意義,介紹瞭國內外常用的幾種巖體力學參數的確定方法,但其準確性值得商榷和論證。針對Hoek-Brown彊度準則D值的確定存在的睏難,基于模糊綜閤評判,對產生擾動的影響因數綜閤攷慮,確定瞭依託工程的 D 值,工程應用錶明更加接近實際情況,併且探討瞭巖質邊坡的巖體以滑動麵為界限劃分擾動區與非擾動區的閤理性,剋服瞭其他公式的不足。以利比裏亞邦礦鐵礦巖體力學參數研究為例,分彆用計算齣的脩正參數和其他幾種方法進行計算分析對比,結果錶明所計算齣的脩正 D 值更能反映實際的擾動程度,併論證瞭劃分擾動區與非擾動區的閤理性和意義,具有重要參攷價值。
천술료암질변파암체역학삼수연구적의의,개소료국내외상용적궤충암체역학삼수적학정방법,단기준학성치득상각화론증。침대Hoek-Brown강도준칙D치적학정존재적곤난,기우모호종합평판,대산생우동적영향인수종합고필,학정료의탁공정적 D 치,공정응용표명경가접근실제정황,병차탐토료암질변파적암체이활동면위계한화분우동구여비우동구적합이성,극복료기타공식적불족。이리비리아방광철광암체역학삼수연구위례,분별용계산출적수정삼수화기타궤충방법진행계산분석대비,결과표명소계산출적수정 D 치경능반영실제적우동정도,병론증료화분우동구여비우동구적합이성화의의,구유중요삼고개치。
Firstly, the importance of study on mechanical parameters of rock mass is presented, and some methods to determine mechanical parameters are introduced, whereas their accuracy are questionable and argument. As there is difficulty in determining the disturbance factor D relayed on the Hoek-Brown strength criterion, fuzzy comprehensive evaluation is employed. Considered the factors influencing on disturbance and relevant engineering experience, the value of D is calculated accordingly, which is more corresponded to the practicality. Afterward, the rationality, that the bounds characterized by slip surface for dividing disturbed and undisturbed zone, is discussed;and it overcome deficiency of other expressions. Additionally, to further verify the reasonability and significance of such dividing, and with a practical engineering, calculation of the factor D is given using the modified and other methods respectively. According to the comparative analysis, it is shown that the former is more suitable to the disturbance degree in-situ.